Casi 6 horas los he llegado a utilizar sumando los descansos en un día y seguían aguantando. The picture of my feet dyed is what has happened every time I?ve tried to wear them for short periods of time. It is strong but also gives me some trouble cleaning the floor. - There is a clicking sounds that occurs when you use them while walking. Thank you Vifa for this nice product . Usually the foam will start to deteriorate by now but its still like new for me except for some discoloration from skin oils. Very portable for my travel luggage. The rack easily holds my bicycle with the bar between the seat and handlebars. Definitely recommend the produce and the company (Vital Store). The headphones are perfect for everyday listening and deliver an overall comfortable listening experience.